2. Quantity. How to update quantity using Check in-out.

When Check in-out entry is linked to inventory item quantity, Barcode Express will recalculate the inventory quantity every-time check in-out transaction is created. It calculates the current inventory balance based on all the check in-out transactions and automatically updates the quantity number for the inventory item.

Since all this calculation and update happen automatically, user shouldn't touch the quantity number directly. The increase/decrease inventory quantity should be done with check-in/ check-out transactions instead of number change in quantity field. If user wants to increase the inventory balance, one will create check-in transaction with necessary amount.